Arkansas blew a 17-point lead in the final six minutes and lost 69-66 to Stanford on Friday at Barclays Center in New York.
Manuale Watkins was called for goal-tending a shot by Marcus Allen with 2.7 seconds remaining to give the Cardinal the lead. Stanford made two subsequent free throws after Arkansas coach Mike Anderson was charged with a technical foul and Dusty Hannahs' half-court heave rimmed out at the buzzer.
The Cardinal (3-3) finished the game on a 21-1 run. Arkansas didn't make a shot after Watkins' layup with 6:39 remaining.
The Razorbacks led by as many as 20 points in the first half and 41-31 at halftime. Stanford led for a total of 1:02 game time.
Rosco Allen scored 25 points and had nine rebounds to lead the Cardinal. Marcus Allen and Michael Humphrey scored 12 points apiece.
Anthlon Bell scored 17 points to lead Arkansas, but scored only two points after halftime. Jimmy Whitt added 14 points and Dusty Hannahs and Moses Kingsley scored 12 apiece.
Kingsley also had 12 rebounds.
The Razorbacks (2-3) are scheduled to play again Tuesday against Northwestern State.